<template>
  <section class="loginContainer">
    <div class="loginInner">
      <div class="login_header">
        <h2 class="login_logo">硅谷外卖</h2>
        <div class="login_header_title">
          <a href="javascript:;" :class="{ on: loginWay }" @click="loginWay=true">短信登录</a>
          <a href="javascript:;" :class="{ on: !loginWay }" @click="loginWay=false">密码登录</a>
        </div>
      </div>
      <div class="login_content">
        <form @submit.prevent="login">
          <div :class="{ on: loginWay }">
            <section class="login_message">
              <input type="tel" maxlength="11" placeholder="手机号" v-model="phone" />
              <button
                :disabled="!verifyPhone?true:false"
                class="get_verification"
                :class="{get_code: verifyPhone && !sencond}"
                @click.prevent="getCode"
              >{{ !sencond ? '获取验证码' : `已发送(${sencond})` }}</button>
            </section>
            <section class="login_verification">
              <input type="tel" maxlength="8" placeholder="验证码" v-model="captcha" />
            </section>
            <section class="login_hint">
              温馨提示：未注册硅谷外卖帐号的手机号，登录时将自动注册，且代表已同意
              <a href="javascript:;">《用户服务协议》</a>
            </section>
          </div>
          <div :class="{ on: !loginWay }">
            <section>
              <section class="login_message">
                <input type="text" maxlength="11" placeholder="手机/邮箱/用户名" v-model="name" />
              </section>
              <section class="login_verification">
                <input
                  type="password"
                  maxlength="8"
                  placeholder="密码"
                  v-model="pwd"
                  v-show="showPwd"
                />
                <input type="text" maxlength="8" placeholder="密码" v-model="pwd" v-show="!showPwd" />
                <div
                  class="switch_button"
                  @click="showPwd=!showPwd"
                  :class="{on: !showPwd, off: showPwd}"
                >
                  <div class="switch_circle" :class="{right: !showPwd}"></div>
                  <span class="switch_text">{{ showPwd ? '...' : 'abc'}}</span>
                </div>
              </section>
              <section class="login_message">
                <input type="text" maxlength="11" placeholder="验证码" v-model="code" />
                <img
                  class="get_verification"
                  src="http://localhost:4000/captcha"
                  alt="captcha"
                  @click="sendCode"
                  ref="codeImg"
                />
              </section>
            </section>
          </div>
          <button class="login_submit">登录</button>
        </form>
        <a href="javascript:;" class="about_us">关于我们</a>
      </div>
      <a href="javascript:" class="go_back" @click="$router.back()">
        <i class="iconfont icon-jiantou2"></i>
      </a>
    </div>
    <AlertTip :alertText="alertText" @closeTip="closeTip" v-if="alertShow" />
  </section>
</template>
 
<script>
import AlertTip from "../../components/AlertTip/AlertTip";
import { reqNameLogin, reqSMS, reqPhoneSMS } from "../../api/index";

export default {
  data() {
    return {
      loginWay: true, // true 代表短信登录
      phone: "", // 手机号
      sencond: 0, // 剩余秒数
      pwd: "", //密码
      showPwd: true, // 是否显示密码
      alertText: "", //消息提示框内容
      alertShow: false, // 提示框是否显示
      code: "", // 图形验证码
      name: "", // 用户名
      captcha: "" // 短信验证码
    };
  },
  computed: {
    verifyPhone() {
      const { phone } = this;
      if (/^1\d{10}$/.test(phone)) {
        return true;
      } else {
        return false;
      }
    }
  },
  methods: {
    // 获取短信验证码
    getCode() {
      if (this.sencond == 0) {
        // 向输入的手机号发送验证码
        reqSMS(this.phone);
        // 设置发送的时间
        this.sencond = 30;
        // 开启定时器
        let intervalId = setInterval(() => {
          this.sencond--;
          if (this.sencond === 0) {
            clearInterval(intervalId);
          }
        }, 1000);
      }
    },
    // 登录功能
    async login() {
      // 判断登录的方式
      const {
        loginWay,
        verifyPhone,
        phone,
        captcha,
        showAlert,
        name,
        pwd,
        code
      } = this;
      // 登录的结果
      let result = {};
      if (loginWay) {
        // 手机验证码登录方式
        // 表单验证
        if (!phone) {
          showAlert("手机号不能为空");
          return;
        } else if (!verifyPhone) {
          console.log(111);
          showAlert("手机号格式不正确");
          return;
        } else if (!/^\d{6}$/.test(captcha)) {
          showAlert("验证码不正确");
          return;
        } else {
          // 提交登录请求
          const loginInfo = {
            phone: this.phone,
            code: this.captcha
          };
          // 发送 ajax 请求， 验证短信登录结果
          result = await reqPhoneSMS(loginInfo);
        }
      } else {
        // 密码登录方式
        //表单验证
        if (!name) {
          showAlert("用户名不能为空");
          return;
        } else if (!pwd) {
          showAlert("密码不能为空");
          return;
        } else if (!code) {
          showAlert("验证码不能为空");
          return;
        } else {
          // 提交登录请求
          const loginData = {
            name: this.name,
            pwd: this.pwd,
            captcha: this.code
          };
          // 发送ajax请求，验证码密码登录方式
          result = await reqNameLogin(loginData);
        }
      }
      // 判断是否登录成功
      if (result.code === 0) {
        // 跳转到个人中心页面
        this.$router.replace("/profile");
        // 保存用户信息到 vuex 中
        this.$store.dispatch("accessUserInfo", result.data);
      } else {
        // 弹框显示返回的信息
        this.showAlert(result.msg);
        // 重新请求一个图形验证码
        this.sendCode();
        // 清空验证码的文本
        this.code = "";
        this.captcha = "";
      }
    },
    // 显示并提示框中的内容的方法
    showAlert(text) {
      this.alertText = text;
      this.alertShow = true;
    },
    // 关闭提示框
    closeTip() {
      this.alertShow = false;
    },
    // 重新请求一个图形验证码
    sendCode() {
      this.$refs.codeImg.src =
        "http://localhost:4000/captcha?time" + Date.now();
    }
  },
  components: {
    AlertTip
  }
};
</script>
 
<style scoped lang = "stylus">
.loginContainer {
  width: 100%;
  height: 100%;
  background: #fff;

  .loginInner {
    padding-top: 60px;
    width: 80%;
    margin: 0 auto;

    .login_header {
      .login_logo {
        font-size: 40px;
        font-weight: bold;
        color: #02a774;
        text-align: center;
      }

      .login_header_title {
        padding-top: 40px;
        text-align: center;

        >a {
          color: #333;
          font-size: 14px;
          padding-bottom: 4px;

          &:first-child {
            margin-right: 40px;
          }

          &.on {
            color: #02a774;
            font-weight: 700;
            border-bottom: 2px solid #02a774;
          }
        }
      }
    }

    .login_content {
      >form {
        >div {
          display: none;

          &.on {
            display: block;
          }

          input {
            width: 100%;
            height: 100%;
            padding-left: 10px;
            box-sizing: border-box;
            border: 1px solid #ddd;
            border-radius: 4px;
            outline: 0;
            font: 400 14px Arial;

            &:focus {
              border: 1px solid #02a774;
            }
          }

          .login_message {
            position: relative;
            margin-top: 16px;
            height: 48px;
            font-size: 14px;
            background: #fff;

            .get_verification {
              position: absolute;
              top: 50%;
              right: 10px;
              transform: translateY(-50%);
              border: 0;
              color: #ccc;
              font-size: 14px;
              background: transparent;

              &.get_code {
                color: #000;
              }
            }
          }

          .login_verification {
            position: relative;
            margin-top: 16px;
            height: 48px;
            font-size: 14px;
            background: #fff;

            .switch_button {
              font-size: 12px;
              border: 1px solid #ddd;
              border-radius: 8px;
              transition: background-color 0.3s, border-color 0.3s;
              padding: 0 6px;
              width: 30px;
              height: 16px;
              line-height: 16px;
              color: #fff;
              position: absolute;
              top: 50%;
              right: 10px;
              transform: translateY(-50%);

              &.off {
                background: #fff;

                .switch_text {
                  float: right;
                  color: #ddd;
                }
              }

              &.on {
                background: #02a774;
              }

              >.switch_circle {
                // transform translateX(27px)
                position: absolute;
                top: -1px;
                left: -1px;
                width: 16px;
                height: 16px;
                border: 1px solid #ddd;
                border-radius: 50%;
                background: #fff;
                box-shadow: 0 2px 4px 0 rgba(0, 0, 0, 0.1);
                transition: transform 0.3s;

                &.right {
                  transform: translateX(30px);
                }
              }
            }
          }

          .login_hint {
            margin-top: 12px;
            color: #999;
            font-size: 14px;
            line-height: 20px;

            >a {
              color: #02a774;
            }
          }
        }

        .login_submit {
          display: block;
          width: 100%;
          height: 42px;
          margin-top: 30px;
          border-radius: 4px;
          background: #4cd96f;
          color: #fff;
          text-align: center;
          font-size: 16px;
          line-height: 42px;
          border: 0;
        }
      }

      .about_us {
        display: block;
        font-size: 12px;
        margin-top: 20px;
        text-align: center;
        color: #999;
      }
    }

    .go_back {
      position: absolute;
      top: 5px;
      left: 5px;
      width: 30px;
      height: 30px;

      >.iconfont {
        font-size: 20px;
        color: #999;
      }
    }
  }
}
</style>